"I think that it was all incredible. I'm literally living my dream right now, so I think that it was all a dream come true and it was amazing," she tells PEOPLE. "It still really doesn't feel real, but it's all amazing."

Jenner, 18, says walking the runway last week wasn't as nerve-racking as she expected.

"I thought I was going to be very, very, very nervous to the point where I felt like I was going to throw up, but I wasn't, I was really comfortable," she says. "I had a lot of good people surrounding me backstage and I had a lot of good people out just like, I had a lot of support so it was amazing."

And what about sitting with Ms. Wintour?

"It was incredible," Jenner says. "I am a very huge fan of hers so it was also a dream come true."

Jenner is not only modeling others' designs, she's introducing more of her own – a shoe collection for Steve Madden, Madden Girl that she created with her sister Kylie.

"A shoe line is something we've always wanted to do," Kendall says. "We have our clothing line and I think that this is just like kind of the next step to what we want to be doing, so it's fun."

Kendall Jenner and Anna Wintour sit front row at the Topshop Unique show at London Fashion Week